Overview

New technologies at the heart of the system make your Mac more reliable, capable, and responsive — and lay the foundation for future innovations. macOS High Sierra also refines the features and apps you use every day. It’s macOS at its highest level yet.

Easily organize, edit and view your photos in Photos.

• Make short videos from your Live Photos using new Loop and Bounce effects.• Easily locate and organize your content with the new sidebar.• Conveniently access all of your editing tools in the redesigned Edit View.• Fine-tune color and contrast in your photos with new Curves and Selective Color tools.• Access third-party apps directly from Photos and save the edited images back to your Photos library.• Rediscover images from your library with new Memories themes including pets, weddings, outdoor activities, and more.• Create printed photo products and more using new third-party project extensions.

Copy and paste files from one Mac to another with Universal Clipboard.

Safely store your family data in iCloud.

• Share a single iCloud storage plan with your family and keep everyone’s data backed up and safely stored.• Set up your family with a few clicks and add capabilities when needed.

Work together with iCloud Drive.

• Share and work on any file in iCloud Drive with other people so it is always be up to date with the latest edits.

Upgrade the performance, reliability, and security of your Mac with the new Apple File System.

• Update to a new file system architecture designed for all-flash Macs.• Experience greater responsiveness when performing common tasks like duplicating a file and finding the size of a folder.• Enjoy faster and more reliable backups.• Protect your entire drive with built-in native encryption for greater security.

Step up to the new standard for 4K video: HEVC.

• Create and watch high-resolution video with High Efficiency Video Coding (HEVC), which uses up to 40 percent less space without sacrificing quality.

Enjoy next-generation graphics and computation with Metal 2.

• Get the most out of the graphics capabilities of your Mac with the new and improved version of Metal.• Discover immersive tools for content creation with support for virtual reality.• Build state-of-the-art apps with features that accelerate common machine learning functions.

Some features may not be available in all regions or all languages. Some features require an iCloud storage plan. Some features have hardware requirements. Apple File System requires all-flash internal storage.

What’s New in macOS High Sierra 10.13.3 Build 17D47

The macOS High Sierra 10.13.3 update improves the security and stability of your Mac.

This update:

• Addresses an issue that could cause Messages conversations to temporarily be listed out of order